ISO/IEC 19075-5:2021
Information technology - Guidance for the use of database language SQL - Part 5: Row pattern recognition
Ausgabedatum:
2021-09
Edition:
1.0
Sprache: EN - englisch
Seitenzahl: 74 VDE-Artnr.: 250266
This document discusses the syntax and semantics for recognizing patterns in rows of a table, as defined in ISO/IEC 9075-2, commonly called “SQL/RPR”.
SQL/RPR defines two features regarding row pattern recognition:
— Feature R010, “Row pattern recognition: FROM clause”
— Feature R020, “Row pattern recognition: WINDOW clause”
These two features have considerable syntax and semantics in common, the principle difference being whether the syntax is placed in the FROM clause or in the WINDOW clause.